Ice-plow.



E. W. AYERS.

ICE PLOW.

APPLICATiON FILED DEC. 20, 1912- L} 3435(1) PatentedApr. 6, 1915.

m 2 /& 000302000000000008 Z4 Z Z9 'ZZ'Z7zeazses: jrzacnzar,

f/QQ DEW. QWMQW,

, ZiM

IHE NORRIS PF TENS c0 PHOTO'LITHO. WASHINGTON, DV 0 EDWARD W. AYERS, 0F MANCHESTER, MASSACHUSETTS.

ICE-PLOW.

Application filed December 20, 1912.

To (ZZZ whom it may concern Be it known that I, EDWARD W. AYERS, a citizen of the United States, residing at Manchester, in the county of Essex and State of Massachusetts, have invented an Improvement in IcePlows, of which the following is a specification.

This invention relates to ice-plows, and has for its object the construction of an improved form of clearing-tooth arranged at the forward end of the plow by which the kerf or groove formed in the ice is cleared of all obstructions to admit of the passage of the cutting-teeth in rear of it. Heretofore a clearing-tooth has been employed at the forward end of the plow having an an gularly formed nose or point, and when it encountered an obstacle, not easily removable, the progress of the plow was suddenly checked, resulting in the rear end of the plow tipping upward, and sometimes this upward tipping movement was sufficient to overturn the plow and cause it to forcibly strike the horse. With my improved form of olearing-tooth this difficulty is obviated.

Figure 1 is a side elevation of an ice-plow embodying this invention. Fig. 2 is an enlarged side view of the clearing-tooth, and Fig. 3 is a section on the line 33, Fig. 2, illustrating the clearing-tooth in rear elevation.

10 represents the beam of the plow; 12 the handles attached to the rear end of the plow-beam; 13 a clevis attached to the front end thereof; 14: the usual cutting-teeth attached to and extended downwardly from the beam. My novel clearing-tooth is arranged at the forward end of the beam and is attached thereto by bolts just the same as the cutting-teeth are attached. Said clearing-tooth consists of a thin flat blade or plate of substantially the same thickness as the cutting-teeth, and has its upper end-portion or shank 20, formed with an ear 21, which is extended rearwardly and the top edge of said end-portion and ear are formed with a straight edge 22, and the end of the ear is formed with an inclined edge 23, and the bottom of the ear is formed with a straight edge 24, which latter is beveled, as shown in Figs. 2 and 3; and said end-portion has holes through it for the attaching-bolts. The body-portion of the tooth is extended downward and for- Specification of Letters Patent.

?atented Apr. 6, 1915..

Serial No. 737,837.

ward, and its front edge 27 is inclined from said upper end-portion to a nose 28, and said nose is rounded and continues in a curve to the rear edge 29 of the body, which rear edge is convexly curved and extends upward and rearward to the ear 21.

A narrow flange or rib extends continuously along each side ofthe front edge 27 and nose 28, and said flanges project outwardly from the body-portion, so that the front edge of the body-portion and of the nose of the clearing tooth are approximately as thick as the full width of the kerf which is out by the cutting teeth, while the remainder of said body-portion is thinner than the kerf. Said clearing tooth is placed in position on the beam, so that the lower edge of the nose at the junction of said nose and the upwardly and rearwardly curved edge 29, engages the bottom of the kerf or groove, and such engaging portion being curved, it will be observed, that engagement occurs only for a short distance, thereby reducing the friction to the minimum. By forming the tooth with a rounded nose it will be observed that upon encountering an obstacle, said obstacle will be moved downward or upward gradually, so that the tooth will pass over the obstacle, or the obstacle will be moved upward and out of the groove. In either case the progress of the plow will not be checked, hence will not be tipped upward upon encountering an obstacle. By curving the rear edge convexly in an upward and rearward direction, as shown, a wide space is provided between the clearing tooth and the cutting-tooth in rear of it, so that said cutting-tooth will efiectively engage and cut the ice at the bottom of the groove and ample clearance is provided for the chips.

ll claim A clearing tooth for ice plows constructed of a metallic strip having approximate uniform thickness throughout with the forward edge projected downwardly and forwardly and the nose or ice lrerf engaging portion rounded into approximately semi-cylindrical shape, the forward edge of the tooth and the portion of the nose coincident with the forward edge having oppositely projecting flanges extending at approximately right angles to the side surfaces of the tooth, the lower ends of the lange limiting the riding depth of the tooth in the out, the flanges name to this specification, in the presence of in zlildvance of thathportion of the tooth nortWo subscribing itnesses.

ma y restln'g 1n t e out presentin a coini paratively Wide rounded portion td act as a EDWARD AYERS riding abutment to displace or over-ride an Witnesses:

obstruction. B. J. NOYES, In testimony whereof, I have signed my H. B. DAVIS.

Copies 01? this patent may be obtained for five cents each, by addressing the Commissioner oi Batents,

Washington, D. C. 

